X+12y=88, x=8y-12
Solve the systems of equations

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

What is the missing value in the proportion 4/5 = x/30

How does percent markup and percent discount relate to percent of change?